Unidirectional code for interactive map system

Details Unidirectional code for interactive map system Unidirectional code for interactive map system

1982-06-10

1984-04-24

Pitts, Harold I.

Registers

Coded record sensors

Particular sensor structure

235462, 235494, G06K 710

Patent

active

044450281

ABSTRACT:
A system for plotting information on maps and reading information therefrom omprising maps which have machine-readable codes on the backs thereof arranged to indicate the coordinates of the map. A stylus is adapted to be moved over the map surface to read the map coordinates by sensing the codes thereon. The novel unidirectional codes comprising code bars all extending in the same direction, permit the use of simplified code sensing apparatus.

REFERENCES:
patent: 3052800 (1962-09-01), Miller
patent: 4110610 (1978-08-01), Mueller et al.
patent: 4143267 (1979-03-01), Johnson et al.

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